This complete walkthrough guide is for Koopa Troopa Cave (1-2). This complete walkthrough will provide you with a 100% video playthrough and a screenshot of where you can find all the green stars. This stage offers some decent secrets to help you pass the stage.
Game Play Walkthrough Video
Green Star 1
You cannot miss this green star. You will see it between two moving platforms. Simply jump to it and grab it.
Green Star 2
Beyond the check point you will find a purple box. Enter it to kill two Koopa Troopas within 10 seconds to get the second green star. Note that you can consider to grab the secret Fire Flower before enter the purple box stage, this power up can help you finish the turtle match much easier.
Green Star 3
You won’t miss this stage as it is located from a stack of Goombas. It will be an easy star to get if you get the secret invincible star.
Jump to reveal some hidden blocks so that you can jump onto the platform. Once on the platform, go through the pipe to get to a secret room with the stamp.
Other Notable Secrets
Secret Fire Flower
Right in front of the check point flag, there is a secret fire flower for you to get.
Before you get the third green star from the stack of Goombas, you can obtain the invincible star from hidden blocks on the platform.